# a={}
# print(type(a))
# b=dict()
# print(type(b))

a={
    'id':1,
    'name':'zhangsan'
}
# print('id' in a)
print(a['id'])
a['score']=90
print(a)

a['score']=100
print(a)

for key in a:
    print(key,a[key])